clear, close, clc
A = [0 1; -1 -0.1];
B = [0; 1];
C = eye(2);
D = [0;0];

sys = ss(A,B,C,D);

impulse(sys, 100)

%% signal
t = 0:0.01:100;
u = 0*t;
u(1001:2000) = (1:1000)/10000;
u(2001:3000) = (1000 - (1:1000)/10000);
plot(t,u)
lsim(sys, u,t)